Ass we know that the older computers had a numerous different methods of entering the BIOS setup. Below this is a listing of general key sequences that may have had to be pressed when the computer is booting.

• CTRL + ALT + ESC

• CTRL + ALT + INS

• CTRL + ALT + ENTER

• CTRL + ALT + S

• PAGE UP KEY

• PAGE DOWN KEY

If your computer is unable to boot or you might wish to restore your BIOS back to bootable settings and your computer uses ACER BIOS, then press and hold the F10 key when you turn on the computer. By holding this you will hear two beeps it indicates that the settings are been restored.

In older AMI BIOS could be easily restored back to the bootable settings by only pressing and holding the while the computer is booting.In earlier time 486, 386, and 286 computers use to require a floppy disk in order to enter the BIOS setup in the computer. These diskettes are known as ICU, BBU, and SCU disks. Because these diskettes are unique to the computer manufacturer and you must obtain the diskettes from them only.